Chi-teck/drupal-code-generator binary allows to scaffold code for drupal.
Drush embed 1.* branches and commands, but a 2.* version exist and offer new features
DCG could be used as a standalone phar (https://github.com/Chi-teck/drupal-code-generator#installation)
Having it in the path of the php image won't break the existing 1.* drush integration and would also allow use to use new features from the 2.* branch directly.